You can't tell me you have never had people argue a ruling or afterwords, even when you showed them it(showed em up) not call you an A- hole or something.
You have to remember, some players build a deck, and before they even play it, go hunt up every ruling, scenario that their cards can be put into. So when they play they believe they are correct, as it is what they have in their mind/little black books, as a ruling. It always causes problems, and no matter how diplomatically you handle it, you still piss them off and they usually get irate.
Also remember, being a Judge for some people, is nothing. They don't care who you say you are, or what you are, they are always right and you are always wrong. I call them hardheaded, and general very disruptive/rude players. Everyone has come across one or two like that in their careers. It's just a fact of life.
I'm out!!